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Ring Timeout
Timeout for ringing before a call is answered, e.g. 20
seconds.
Allow LAN Use Only
Check to reject registration and calls from WAN in a SIP
ID same as the extension number. I.e., this extension
must be on LAN.
Call Keep Alive
Select to check if the call is still active. Frequency
check is specified in 5.1.13.
Registered Keep Alive
Select to check if the register still exists in a certain
time.
Disable Fast Bridging
Select to disable express media forwarding.
With Fast Bridging feature enabled, if the two
parties involved in a call (for example, one IP
extension and one SIP trunk) use different DTMF
modes (RFC2833/SIP INFO/Inband), inline transfer
(*#) or 2nd-dialing might fail. To avoid such
problem, it is recommended to set the same
DTMF mode for all IP extensions and SIP trunks in
the IPBX, as well as for all IP phones registered to
the IPBX. If it is not feasible to set the same
DTMF mode for some IP extensions or SIP trunks,
and inline transfer or 2nd-dialing is necessary for
those IP extensions or SIP trunks, the Fast
Bridging feature can be disabled on a per IP
extension and per SIP trunk basis. Note that Fast
Bridging is enabled by default.
Try Peer-to-peer RTP
If click YES, IP PBX will attempt to notify the two peers
in a conversation to try peer-to-peer RTP transmission.
This is suggested as long as phones support INVITE or
UPDATE method during a connected call to save the
resource of IP PBX. However, only SIP INFO DTMF
mode phones should enable this since other DTMF
modes require IP PBX being RTP relay server to
support in-line transfer.
DTMF Mode
Choose preferred DTMF mode for this extension.
Currently supported types include RFC2833, SIP INFO,
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